TW200637290A - Method and apparatus for adaptive modulation of wireless communication signals - Google Patents

Method and apparatus for adaptive modulation of wireless communication signals

Info

Publication number
TW200637290A
TW200637290A TW094144482A TW94144482A TW200637290A TW 200637290 A TW200637290 A TW 200637290A TW 094144482 A TW094144482 A TW 094144482A TW 94144482 A TW94144482 A TW 94144482A TW 200637290 A TW200637290 A TW 200637290A
Authority
TW
Taiwan
Prior art keywords
wireless communication
modulator
modulation
communication signals
adaptive modulation
Prior art date
Application number
TW094144482A
Other languages
Chinese (zh)
Inventor
Aaron W Netsell
Neil R Peplinski
Original Assignee
Motorola Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Motorola Inc filed Critical Motorola Inc
Publication of TW200637290A publication Critical patent/TW200637290A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0008—Modulated-carrier systems arrangements for allowing a transmitter or receiver to use more than one type of modulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Transmitters (AREA)

Abstract

A block edge detector (310) determines whether a wireless communication transmission with a first modulation having excess spectral emissions will be transmitted at a frequency on a block edge. In response, a modulator selector (320) changes the wireless communication transmission to a second modulation with lessened spectral emissions. Preferably, the second modulator (340) is operably coupled to an alternative lookup table (360) wherein phase trajectory entries likely to cause excess spectral emissions such as spurious emissions are smoothed. The entries may be smoothed by filtering, non-linear extrapolation, and/or linear extrapolation. Alternatively, the second modulator (340) uses an alternative lookup table (360) that is a GMSK modulator with BT less than 0.3.
TW094144482A 2004-12-29 2005-12-15 Method and apparatus for adaptive modulation of wireless communication signals TW200637290A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/025,324 US7787562B2 (en) 2004-12-29 2004-12-29 Method and apparatus for adaptive modulation of wireless communication signals

Publications (1)

Publication Number Publication Date
TW200637290A true TW200637290A (en) 2006-10-16

Family

ID=35945200

Family Applications (1)

Application Number Title Priority Date Filing Date
TW094144482A TW200637290A (en) 2004-12-29 2005-12-15 Method and apparatus for adaptive modulation of wireless communication signals

Country Status (3)

Country Link
US (1) US7787562B2 (en)
TW (1) TW200637290A (en)
WO (1) WO2006071413A1 (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8068435B2 (en) * 2007-08-03 2011-11-29 Viasat, Inc. Rate adaptive modem
US8320497B2 (en) * 2008-02-14 2012-11-27 Broadcom Corporation Real and complex spectral shaping for spectral masks improvements
US8224277B2 (en) * 2008-09-26 2012-07-17 Semiconductor Energy Laboratory Co., Ltd. Semiconductor device
US9444146B2 (en) 2011-03-24 2016-09-13 Keyssa, Inc. Integrated circuit with electromagnetic communication
US8554136B2 (en) 2008-12-23 2013-10-08 Waveconnex, Inc. Tightly-coupled near-field communication-link connector-replacement chips
US8811526B2 (en) * 2011-05-31 2014-08-19 Keyssa, Inc. Delta modulated low power EHF communication link
WO2012174350A1 (en) 2011-06-15 2012-12-20 Waveconnex, Inc. Proximity sensing and distance measurement using ehf signals
WO2013059802A1 (en) 2011-10-21 2013-04-25 Waveconnex, Inc. Contactless signal splicing
KR102030203B1 (en) 2011-12-14 2019-10-08 키사, 아이엔씨. Connectors providing haptic feedback
US9414184B2 (en) * 2012-02-15 2016-08-09 Maxlinear Inc. Method and system for broadband near-field communication (BNC) utilizing full spectrum capture (FSC) supporting bridging across wall
CN104272284B (en) 2012-03-02 2017-09-08 凯萨股份有限公司 duplex communication system and method
US9515365B2 (en) 2012-08-10 2016-12-06 Keyssa, Inc. Dielectric coupling systems for EHF communications
US9374154B2 (en) 2012-09-14 2016-06-21 Keyssa, Inc. Wireless connections with virtual hysteresis
EP2932556B1 (en) 2012-12-17 2017-06-07 Keyssa, Inc. Modular electronics
CN105379409B (en) 2013-03-15 2019-09-27 凯萨股份有限公司 EHF safety communications equipment
CN105264785B (en) 2013-03-15 2017-08-11 凯萨股份有限公司 Extremely high frequency communication chip
US9749871B2 (en) 2015-08-03 2017-08-29 Apple Inc. Radio frequency systems and methods for overriding network signaling values

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI89649C (en) * 1991-09-17 1993-10-25 Nokia Mobile Phones Ltd Procedure for increasing capacity and minimizing power consumption in a cellular radio system
US6307441B1 (en) * 1997-12-31 2001-10-23 Texas Instruments Incorporated Shape modulation transmit loop with digital frequency control and method for same
US6084919A (en) * 1998-01-30 2000-07-04 Motorola, Inc. Communication unit having spectral adaptability
US7409007B1 (en) 1999-09-14 2008-08-05 Lucent Technologies Inc. Method and apparatus for reducing adjacent channel power in wireless communication systems
US6992990B2 (en) * 2000-07-17 2006-01-31 Sony Corporation Radio communication apparatus
US6906996B2 (en) 2002-05-20 2005-06-14 Qualcomm Inc Multiple modulation wireless transmitter

Also Published As

Publication number Publication date
WO2006071413A1 (en) 2006-07-06
US7787562B2 (en) 2010-08-31
US20060140305A1 (en) 2006-06-29

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